Why is the chill factor not displayed?

After a measurement has been taken we display the wind chill. We use the North American and United Kingdom wind chill index.

Please note that a wind chill temperature is not defined for all weather conditions:

Windchill temperature is defined only for temperatures at or below 10 °C (50 °F) and wind speeds above 4.8 kilometres per hour (3.0 mph).

Therefore the app will sometimes display a “-” instead of a value.